Single and combined applications of arbuscular mycorrhizal fungi and Enterobacter radicincitans affect nutrient uptake of faba bean and soil biological characteristics.
Microorganisms like arbuscular mycorrhizal fungi (AMF) and plant growth-promiting rhizobacteria (PGPR) can contribute significantly to plant nutrition and thus may help to reduce chemical inputs in agricultural systems. In two pot experiments under semi-controlled conditions the effects of applications with AMF and an Enterobacter radicincitans strain were evaluated regarding shoot yield and nutrient uptake (P and N) of faba bean (Vicia faba) as well as on soil characteristics (basal respiration, microbial bio¬mass, and the number of P solubilizing bacteria). The first experiment (2007) was established to investigate the single and combined effects of AMF and E. radicincitans. The second experiment (2008) was established on a nutrient poor soil to evaluate the efficacy of PGPR and AMF with or without mineral fertilizer (P, K and Mg) application. For the experiment with suboptimal soil nutrient contents (2008) higher nutrient uptakes of bean was found after application of AMF in comparison to the control. The effect of AMF was comparable to the positive effect of mineral nutrient application. Under better nutrient status of soil (experiment 2007) none of the applied microorganisms affected the growth and nutrient uptake of bean. However, AMF application alone or with mineral nutrient supply increased the soil respiration and soil microbial biomass. The studies showed the potential of AMF applications for plant growth and nutrition mainly under nutrient deficient conditions.
Almethyeb, M.; Ruppel, S.; Paulsen, H.-M.; Vassilev, N.; Eichler-Löbermann, B. 2013. Single and combined applications of arbuscular mycorrhizal fungi and Enterobacter radicincitans affect nutrient uptake of faba bean and soil biological characteristics. Landbauforschung = vTI Agriculture and Forestry Research, 3 (63), 229-234.